Question

Which of the following relations is NOT a function?
A. {(1, 1), (2, 4), (3, 6), (4, 8)}
B. {(−5, 25), (5, 25), (−6, 36), (6, 36)}
C. {(4, −4), (3, −3), (3, 3), (4, 4)}
D. {(3, 12), (5, 20), (7, 28), (8, 32)}

Answer 1

In order to be a function, you can't have two y values for the same x value. So you're looking for the answer choice where you have the same x value repeated more than once but with different y values

Answer 2

C?

Answer 3

C is not a function.